JPH101253A - Discharged paper sheet loading device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly arrange discharged paper sheets so as to eliminate operational trouble in taking out the discharged paper sheets by providing a displaceable member capable of freely displacing between the projecting position projected from the inner wall surface of a side plate where the paper discharge side edge part comes into contact the retreat position retreated from the projecting position toward the outside. SOLUTION: A printed printing paper sheet 25a, that is, a discharged paper sheet 25a is lowered with the substantially central part of the discharged paper sheet 25a bent downward while it is continuously brought into sliding contact with the upper side 30c of each sliding contact inclined surface of an oscillating plate 30 on right and left side plate 22a, 22b surfaces to be orderly loaded on the discharged paper sheet loading surface 21b of a discharged paper sheet tray 21. At the time of taking a sheaf of discharged paper sheets upward, the respective discharged paper sheet side edge parts 25b are continuously brought into sliding contact with each sliding contact inclined surface from the lower side 30d of the sliding contact inclined surface of each oscillating plate 30 to the upper side 30c thereof, and simultaneously each projecting part 30e takes the reteat position so as to smoothly take out the discharged paper sheets without any damage on the projecting part 30e or the like of each oscillating plate 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper ejection device for ejecting and stacking an image-formed paper ejected from an image forming apparatus such as a stencil printing machine or a copying machine, and more particularly to a paper ejection side. The present invention relates to a sheet discharge stacking device for guiding an edge portion and aligning the same on a sheet discharge table.

[0002]

2. Description of the Related Art A thermosensitive digital stencil type stencil printing apparatus is well known as a simple printing apparatus. In this stencil printing machine, a thermoplastic resin film (having a thickness of approximately 1 to 3 μm)
m is generally used), and a laminate having a laminated structure in which Japanese paper fiber, synthetic fiber, or a mixture of Japanese paper fiber and synthetic fiber is laminated as a porous support is used. The film surface is brought into contact with the heating element of the thermal head, and while the thermal head is operated in the main scanning direction, the master is selectively hot-melted to form a perforated image based on the image information. While the master is moved in the sub-scanning direction, the perforated master made by perforating the perforated plate is rotated by forming a plurality of mesh screens of a resin or metal net covering the outer periphery of a porous support cylinder. It is automatically wound around a free plate cylinder, ink is supplied from the ink supply means inside the plate cylinder, and is supplied by a pressing means such as a press roller via a master that has been made. By continuously pressing the printing paper on the plate cylinder, the ink oozes out from the opening portion of the plate cylinder and the perforated portion of the master, and the ink is transferred to the printing paper to perform printing. I have. The printed printing paper on which the ink is transferred and printed as described above (hereinafter sometimes simply referred to as “discharge”) is separated from the plate cylinder by a peeling claw or the like while being suctioned by a suction discharge transfer device or the like. The sheet is conveyed, and a substantially center portion of the discharged sheet is bent downward with respect to the both discharged side edges by a jump plate or the like provided on an upper part of the suction sheet discharging and conveying device to raise a side edge of the printed sheet. A U-shaped curve is formed, the sheet is discharged to a sheet discharge tray, and is stacked on a sheet discharge stacking surface.

In general, in a stencil printing machine, a large amount of water is supplied so that the ink transferred to the surface of the printing paper quickly penetrates into the inside of the printing paper (composed of fibers or the like) and the ink on the surface of the printing paper decreases. Ink is used, and a W / O emulsion ink in which water is dispersed in oil is generally used in order to prevent evaporation even when the ink is left standing. The moisture of the ink transferred to the surface of the printing paper penetrates into the fiber portion of the printing paper and swells the fibers of the printing paper. Of the printing paper, and the center of the printing paper tends to be bent and deformed in an inverted U-shape on the printing surface side (upward when the printing surface is the upper surface side) with respect to both side edges. Therefore, the above-mentioned jump plate provided in the suction conveyance device cancels the inverted U-shaped curve on the printing surface side of the discharged sheet and forcibly forms the U-shaped curve,
In order to strengthen the apparent waist, the paper is discharged to the paper discharge tray while maintaining the U-shaped curved shape.

However, as shown in FIG. 8, for example, while the printed printing paper 25a having the printing surface side as the upper surface side, that is, the discharged paper 25a falls onto the discharged paper stacking surface 21b,
Due to the swelling of the fibers of the printing paper due to the moisture in the ink described above, the U-shaped curved shape formed on the upper surface side on the printing surface side is deformed into an inverted U-shaped curved shape of a reverse kamaboko shape. However, the escape of the air on the lower surface of the paper discharge 25a becomes unstable, and the paper discharge alignment is deteriorated by the right and left directions in the paper discharge width direction Y before the paper is grounded on the paper discharge stacking surface 21b. Therefore, when sorting / sorting after printing is completed, or when a post-processing device (for example, a collator or a sorter) is used, it is necessary to perform a work of rearranging the discharged paper 25a neatly, which is very troublesome. . Also, if the paper output 25a becomes unsteady when it falls,
Rubbing occurs between the discharged paper 25a previously loaded on the discharged paper loading surface 21b and the discharged paper 25a to be loaded next, and the ink of the previous printed image is transferred to the lower surface of the next discharged paper 25a. Inconveniences such as set-off and rubbing the printed image surface to cause stains also occur. In particular, when printing with a large number of solid images is performed, the amount of transferred ink increases, and the above-described problems are likely to occur.

Therefore, in order to prevent the above-mentioned problems from occurring,
For example, as disclosed in Japanese Unexamined Patent Publication No. Hei 6-329327, a substantially "H" -shaped movable member is provided so as to protrude inside the side plate, and both of the paper ejection side edges of the paper ejection are provided. By making contact with the protruding portion, the grounding of the two side edges of the discharged paper at the time of the fall of the discharged paper is made to act later than the center portion, so that the discharged paper is dropped in a U-shaped curved state. In this way, a technique has been proposed in which the alignment of paper discharge during stacking is improved.

[0006]

However, when the paper is ejected from the paper ejection tray, both edges of the ejected paper interfere with the protruding portion of the movable member and become obstructive. An operation to retract the protrusion from the inside of the side plate to the outside or an operation to take out the sheet by opening the side plate to the outside so that the movable member does not interfere is required. Operational trouble when taking out paper was required. Further, in the case where guide rails for retracting from the inside to the outside of the side plate are formed on the side plate in order to eliminate the trouble in operation, there is a problem that the structure becomes complicated.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an inexpensive sheet discharging and stacking apparatus in which the sheet discharge is well aligned, the operation is not troublesome at the time of sheet discharging and taking out, and the problem is solved. .

[0008]

In order to achieve the above-mentioned object, the present invention is directed to a sheet discharge table provided with a sheet discharge stacking surface for stacking a sheet discharge, and a sheet discharge side of the sheet discharge. A sheet output stacking device having at least one side plate standing on the sheet output tray for guiding an edge portion and aligning it on the sheet output stacking surface; A protruding portion that is displaceable between a protruding position protruding from the surface wall to the paper discharge stacking surface side and a retracted position retracted outward from the protruding position, and is slidably contactable with the paper discharge side edge. Having at least one displacement movable member with
The displacement movable member occupies the retracted position immediately after the projecting portion slides on the falling paper ejection side edge, and the projecting portion is released from the sliding contact state with the paper ejection side edge. Immediately after the ejection, the projecting portion occupies the projecting position, and the projecting portion occupies the retracted position when the sheet stacked on the sheet ejection tray is taken out upward.

According to a second aspect of the present invention, in the first aspect of the present invention, the side plates are provided on the discharge tray in pairs so that the inner walls are parallel to each other. I do.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the displacement movable member has a laterally substantially chevron shape in which the protruding portion protrudes from the inner surface wall side to the paper discharge loading surface side. And one of the upper and lower bases of the chevron is pivotally supported, and the other of the upper and lower bases is rotated clockwise and clockwise around the axis when viewed in a plane orthogonal to the sheet discharging direction. It is characterized by having a displacement urging means which is configured to be swingable counterclockwise and urges the projecting portion of the displacement movable member in a direction occupying the projecting position.

Here, the "substantially chevron shape" means a triangular chevron shape, a protruding top portion having a rounded shape, a protruding chevron-shaped slope having an uneven shape or a saw blade. Including those in the form. The above-mentioned triangle also includes a triangle whose protruding apex forms an obtuse angle or a triangle whose protruding apex is rounded and has an angle slightly smaller than 90 degrees.

According to a fourth aspect of the present invention, in the first, second or third aspect of the present invention, the side plate is provided with a plurality of the movable displacement members in a vertical direction. The adjacent protrusions are arranged so as to overlap in the vertical direction when viewed in a plane orthogonal to the sheet discharge direction.

[0013]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In each of the drawings, each component is omitted as appropriate in order to simplify the drawings. In the drawings, components that are configured as a pair and do not need to be particularly distinguished and described will be replaced with the description by appropriately describing one of them for the purpose of simplifying the description. In describing the shapes of component parts and their arrangement positions, the downstream side in the paper discharge direction is sometimes referred to as “front” and the upstream side is referred to as “rear”. The front side may be referred to as “left” and the back side of the paper as “right”. The same reference numerals are given to components having the same shape and function throughout the configuration described in the related art and the respective embodiments and modifications described below, and the description thereof will be omitted as much as possible.

(Embodiment 1) A first embodiment of the present invention (hereinafter, referred to as "embodiment 1") will be described with reference to FIGS. FIG. 1 shows the overall configuration of a stencil printing apparatus to which the first embodiment of the present invention is applied. First, the overall configuration will be briefly described. In FIG. 1, a well-known stencil making unit that constitutes a stencil printing apparatus is disposed at the upper left. The plate making section includes holder means (not shown), platen roller 11, thermal head 10, transport roller pair 12,
It is mainly composed of a cutter 13 and a master guide plate 14, and the above-described components are arranged in this order from upstream to downstream in the master transport direction.

The master 9 is wound in a roll around a roll core 9b to form a master roll 9a. The master roll 9a is rotatable because the roll core 9b is rotatably supported by holder means (not shown). The master 9 is composed of a platen roller 11 rotatably supported on a side plate (not shown).
Is pressed by a thermal head 10 having a large number of heating elements. The rotation of a stepping motor (not shown) connected to the platen roller 11 rotates the platen roller 11 clockwise, so that the master 9 is fed from the master roll 9a in the master transport direction. . The thermal head 10 is urged to the platen roller 11 via the master 9 by a spring member (not shown). The transport roller pair 12 is rotatably supported on the plate making unit side plate while being pressed against each other. The transport roller pair 12 is set so as to rotate at a peripheral speed slightly higher than the transport speed of the platen roller 11. When the master 9 is transported, it slides between the master 9 and an appropriate tension is applied to the master 9. Is to be granted. The cutter 13 has a guillotine-type upper and lower blade for cutting the plate-making master 9 having been made into a set length. Note that the cutter is not limited to the cutter 13 having the upper and lower blades as described above, and may be a cutter of a rotary blade moving type or the like. On the downstream side of the master transport of the cutter 13, there is provided a master guide plate 14, which is fixed between the plate making unit side plates and guides the leading end of the master 9.

A well-known printing unit is disposed below and to the right of the plate making unit. The printing unit includes a plate cylinder 1, an ink supply unit (not shown), and a press roller 1 as a pressing unit.
5 mainly. The ink supply means mainly includes an ink pipe 5, an ink roller 2, and a doctor roller 3.

The plate cylinder 1 is formed by winding a porous support cylindrical body and a mesh screen (not shown) of a resin or metal net covering the outer periphery thereof in a plurality of layers. A master 9 is wound around the outer peripheral surface of the plate cylinder 1. A pair of flanges (not shown) are fixed to both ends of the plate cylinder 1. The plate cylinder 1 has the above-mentioned flange pair,
The ink stencil printing apparatus is rotatably supported on an ink pipe 5 detachably supported on a housing side plate (not shown) of the stencil printing apparatus. The driving force is transmitted by a drive motor (not shown) to rotate clockwise and counterclockwise. It is rotated both clockwise. The ink supply means is provided inside the plate cylinder. A pair of side plates (not shown) is fixed to the ink pipe 5. The ink roller 2 has an ink roller shaft 2a rotatably supported by the pair of side plates. The ink roller shaft 2a is connected to the plate cylinder 1 by drive transmission means such as a gear or a belt. Synchronously rotated in the same direction. The doctor roller 3 is provided with a slight gap from the outer peripheral surface of the ink roller 2, and supplies the ink of the ink pool 4 formed in the wedge-shaped space between the ink roller 2 and the doctor roller 3 to the outer surface of the ink roller 2. I do. The ink in the ink reservoir 4 is sucked by an ink supply device (not shown) from an ink pack or the like disposed outside the plate cylinder 1 via an ink pump or the like (not shown), and is formed in the ink pipe 5. The ink is supplied to the ink reservoir 4 from the supply hole 5a.

A stage 6 made of a magnetic material is provided on the surface of the non-opening portion of the plate cylinder 1 along one generatrix of the plate cylinder 1. A clamper shaft 7 is provided on the plate cylinder 1 in parallel with the stage 6.
a is rotatably supported, and a clamper 7 that can be opened and closed in parallel with the stage 6 is integrally provided on the clamper shaft 7a. A rubber magnet plate is fixed to the clamper 7. When the plate cylinder 1 is stopped at a predetermined position, the clamper 7 is opened and closed by transmitting a driving force of an opening / closing device (not shown) provided near the predetermined position of the housing side plate to the clamper shaft 7a. Is done. The plate cylinder 1 constitutes a drum unit together with the ink supply means, and is detachable together with the drum unit in the axial direction of the ink pipe 5 via an ink pipe 5 supported on the casing side plate.

The press roller 15 is provided below the plate cylinder 1 so as to be able to freely contact and separate from the outer peripheral surface of the plate cylinder 1. The press roller 15 can be moved up and down by a cam or the like (not shown) so as to be able to contact and separate from the outer peripheral surface of the plate cylinder 1, and is urged toward the plate cylinder 1 by an urging spring or the like (not shown). Locking means (not shown) except when the printing paper 25 is passed
Thus, it is held at a position separated from the plate cylinder 1.

On the right side of the plate cylinder 1 and the press roller 15,
A well-known paper feeding unit is provided. The paper feeding unit mainly includes a paper feeding tray (not shown), a separation paper feeding device (not shown), and a pair of registration rollers 16.

The paper feed tray is for loading the print paper 25, and the separation paper feed device is disposed above the paper feed tray, and the print paper 25 on the paper feed tray is provided.
And a separation unit (both not shown) which separates the paper one by one and feeds the paper to the downstream side in the paper transport direction. The registration roller pair 16 has a well-known function of inserting the printing paper 25 fed from the separation paper feeder between the press roller 15 and the plate cylinder 1 at a time, and is in a state where they are in contact with each other. And is rotatably supported by the housing side plate.

The diagonally upper right side of the drawing opposite to the plate making section with the plate cylinder 1 interposed therebetween peels the used master 9 wound around the outer peripheral surface of the plate cylinder 1 and conveys it. A well-known plate discharging unit having a plate discharging device for discarding and discharging the master 9 into a plate discharging box (not shown) (both not shown).
Are arranged.

On the left side of the drawing facing the paper feed unit with the plate cylinder 1 and the press roller 15 interposed, a characteristic paper discharge unit is provided. The paper discharge unit includes a well-known suction conveyance device (not shown) having a jump plate 20 and the like, a well-known peeling claw 8, a paper discharge tray 21, and a pair of left and right side plates 22a and 22b. And a paper discharging and stacking device 29 to be operated.

The suction / conveyance device comprises a paper discharge roller rear 17 and a paper discharge roller front 1 rotatably supported by the housing side plate.
8, a paper discharge belt 19 stretched behind the paper discharge roller 17 and a paper discharge roller front 18, and a suction fan (not shown) arranged below the paper discharge belt 19. Paper ejection belt 1
9 is driven in the paper discharge direction X at a peripheral speed slightly higher than the peripheral speed of the plate cylinder 1 by rotating the paper discharge roller front 18 by a driving unit (not shown). The suction fan sucks and presses the discharged paper 25 a that has been peeled off by the peeling claw 8 and discharged onto the paper discharge belt 19. The jump plate 20 is formed in a substantially mountain shape, and a pair of jump plates 20 are provided on the left and right sides in the paper discharge direction X with their tops facing the front of the paper discharge roller 18 near the upper part of the paper discharge belt 19. The jump plate pair 20 includes a discharge 25
A well-known function of raising both of the paper discharge side edges of the sheet A in such a manner that the central portion of the paper discharge 25a is bent downward in a U-shape with respect to the paper discharge side edges and curved. In FIG. 1, an imaginary arrow indicated by a reference sign Xa indicates a paper ejection flying line. The discharge flight line Xa is formed by a pair of side plates left 22 a and right side plates 22 b on the discharge tray 21 from the upper surface of the jump plate pair 20. It shows a paper discharge path to the vicinity.

The peeling claw 8 is disposed above the suction conveyance device and close to the outer peripheral surface of the plate cylinder 1. The peeling claw 8 is integrally fixed to a peeling claw shaft 8a rotatably supported by the housing side plate, and selectively comes close to the outer peripheral surface of the plate cylinder 1 to print printed paper 25a. From the outer peripheral surface of the plate cylinder 1. On the leftmost side in the figure, a discharge stacking surface 21b on which the discharged discharge 25a is stacked is provided.
A paper discharge tray 21 as a paper discharge table provided with is provided on the housing side plate.

As shown in FIG. 3 only, tray windows 21a each having a rectangular cross section are formed on both left and right sides of the paper discharge tray 21 in the paper discharge width direction Y. It is formed to extend to the vicinity of the center in the paper width direction Y. Left and right tray windows 21
As shown in FIGS. 1 to 3, support plates 24 also serving as stays are provided at both inner lower edge portions of a in the sheet discharge width direction Y. Each support plate 24 has a substantially channel shape opened downward when viewed from a plane orthogonal to the paper discharge width direction Y, and each upper surface of each support plate 24 is flush with the paper discharge stacking surface 21 b of the paper discharge tray 21. Is formed. Each support plate 2
4 is a discharge tray 2 near the center in the discharge width direction Y.
1 and connected and fixed.

On the upper surface of each of the right and left support plates 14, a pair of side plates left 22
a and the right side plate 22b are mounted on the sheet discharge stacking surface 21b so as to be capable of turning over. Each inner wall 22g of the left side plate 22a and the right side plate 22b
Are set up on the paper discharge tray 21 in pairs so as to be parallel to each other, and both paper discharge side edges of the paper discharge 25a can be contacted.

Hereinafter, since the structure around the left side of the side plate 22a and the structure around the right side of the side plate 22b are formed similarly symmetrically, referring to FIGS. Only the area around the side 22a will be described. The base 22e of the left side plate 22a is formed so as to be substantially L-shaped on the outside. A through hole 22f is formed in the base 22e of the left side plate 22a to loosely insert the plate fulcrum shaft 22c. The side plate left 22a is located around the plate fulcrum shaft 22c on the side of the paper discharge loading surface 21b, that is, the side plate. It can be turned upside down inside the left 22a. A plate fulcrum shaft 22 which is close to a substantially L-shaped base 22e of the left side plate 22a.
At both front and rear ends of the sheet c in the sheet discharging direction X, a substantially channel-shaped pressure plate 26 that is open upward is disposed.
Each flange surface of the pressing plate 26 is cut out in a “U” shape, and thus each flange surface of the pressing plate 26 cut out in a “U” shape is connected to each flange surface of the support plate 24. Are engaged with each other. Support plate 24 in vertical direction Z
A compression spring (not shown) is provided between the support plate 2 and the pressure plate 26, and the left side plate 22a is
4.

As described above, each of the left and right side plates 22a and 22b is slidable on the support plate 24 integrally with each press plate 26 so as to be movable. In addition to being moved, the left and right side plates 22a, 22b of each side plate are raised on the paper discharge stacking surface 21b side (also inside) around the plate fulcrum shaft 22c. It is possible to defeat.
Therefore, when the paper discharge tray 21 is stored in the main body of the stencil printing apparatus, the left and right side plates 22a and 22b are folded inside the paper discharge tray 21 and stored together with the paper discharge tray. It has a configuration.

As shown in FIG. 1 only, the paper discharge tray 21 on the most downstream side in the paper discharge direction X receives the front end of the paper discharge 25a and positions the front end of the paper discharge 25a. A well-known end plate 23 movable up and down in the direction X is provided upright. The paper discharge stacking surface 21b of the paper discharge tray 21 is provided on the left side of the pair of side plates.
The right side 22a, 22b and the end plate 23 form a rectangular section.

As shown in FIGS. 1 to 5, a plurality of windows 22d are respectively opened at left and right symmetrical positions in each of the left side plate 22a and the right side plate 22b. Are opened one by one). The plurality of windows 22d are arranged on the left side plate 22a and the right side plate 22b so as to overlap in the vertical direction Z when viewed in a plane orthogonal to the sheet discharge direction X. In each of the windows 22d, a swing plate 30 as a displacement movable member having a protruding portion 30e capable of slidingly contacting the sheet discharge side edge 25b of the sheet discharge 25a is fitted, and is pivotally supported in a swingable manner. I have.
Each rocking plate 30 is disposed at a symmetrical position in each window portion 22d of each side plate left 22a and right side plate 22b. In each of the left and right side plates 22a and 22b, the adjacent protruding portions 30e of each swing plate 30 are arranged so as to overlap in the vertical direction Z when viewed in a plane orthogonal to the paper discharge direction X. I have.

The oscillating plate 30 is made of polyacetal (POM)
It is made of synthetic resin and is made lightweight. In addition, the rocking plate 30 is not limited to the above synthetic resin,
It may be formed integrally or separately from a synthetic resin such as a BS resin or an acrylic resin, or a metal such as an aluminum alloy. Projection 30e of rocking plate 30
Is the inner wall 2 of each side plate left / right 22a, 22b.
It has a substantially mountain-like shape in the lateral direction protruding from the 2g side to the paper discharge stacking surface 21b side. The oscillating plate 30 is pivotally supported on the lower side wall of each window 22d by an oscillating plate shaft 30a formed at the lower end of the lower foot of the projection 30e having a substantially mountain shape, and the upper foot of the projection 30e. The upper end is swingable clockwise and counterclockwise around the swinging plate shaft 30a when viewed in a plane perpendicular to the sheet discharging direction X. The protruding portion 30e has a sliding contact inclined surface 30c inclined in an inverted "C" shape when viewed in a plane orthogonal to the sheet discharging direction X, in other words, a sliding member inclined obliquely downward toward the sheet discharging stacking surface 21b. A contact inclined surface 30c and a sliding contact inclined surface 30d inclined in a "C" shape are formed respectively.

The angle between the upper slidable inclined surface 30c and the lower slidable inclined surface 30d in the protruding portion 30e is determined by projecting from the inner wall 22g of each of the left and right side plates 22a and 22b toward the sheet discharge loading surface 21b. When the amount of protrusion of the protruding portion 30e is not regulated, each paper discharge side edge 25b of the paper discharge 25a comes into sliding contact with each sliding contact inclined surface 30c of each protruding portion 30e of the rocking plate 30. It is desirable that the angle is obtuse in relation to the rotational moment sometimes applied.

A torsion coil spring as displacement urging means (not shown) is wound around each of the rocking plate shafts 30a, and the projecting portion 30e of the rocking plate 30 projects by the urging force of the torsion coil spring. Always biased to occupy position. The biasing force of the torsion coil spring is
The swinging power of the swinging plate 30 is set to a predetermined value. On the other hand, on the back side of the swing plate 30 at the upper end of the upper foot of the protruding portion 30e, the outer plates of the left and right side plates 22a and 22b in the vicinity of the window 22d abut, and the left side of each side plate A protruding portion 30e protruding from the inner wall 22g on the right side 22a, 22b toward the sheet discharge stacking surface 21b;
A rocking plate stopper 30b for regulating the amount of protrusion of the plate is integrally formed.

As described above, each swinging plate 30 has a projecting portion 30e projecting from the inner wall 22g with which the sheet discharge side edge 25b of the sheet discharge 25a contacts to the sheet discharge stacking surface 21b side. 2 (a position shown in FIG. 2 and the like), and a retracted position (a position of the rocking member 30 shown on the uppermost stage on both the left and right sides in FIG. 5) retracted from the protruding position toward the outside of each of the left and right side plates 22a and 22b. ) Can be displaced and swung freely.

Further, since the swing plate 30 is configured as described above, the swing plate 30 on the sliding contact inclined surface 30 in the sheet discharge width direction Y
c, and the distance between the rocking plate shaft 30a and the rocking plate shaft 30a is always ensured, and the paper discharge 25a acting on the sliding contact inclined surface 30c when the paper discharge side edge 25b of the paper discharge 25a falls and descends.
Causes a rotational moment around the swinging plate shaft 30a, and the projecting portion 30e swings about the swinging plate shaft 30a as a fulcrum and occupies the retracted position against the urging force of the torsion coil spring. become.

As shown in FIG. 5, the discharged paper 25a drops and descends, and both the discharged side edges 25b of the discharged paper 25a are moved to the left and right side plates 22a, 22b of the uppermost rocking plate 30 of each side plate. Sliding contact surface 30c on both left and right sides of projection 30e
When descending while sliding on the protruding portions 3 of the rocking plates 30 on the left and right sides by the urging force of the torsion coil springs.
0e and urges in the direction occupying the protruding position, the respective discharge side edges 25b of the paper discharge 25a overcome the urging force of the respective torsion coil springs, and the sliding contact inclined surfaces of the respective protruding portions 30e. The upper part 30c is swung about the swinging plate shaft 30a as a fulcrum, and works so as to be displaced outward from inside the side wall of each window 22d. At the same time, the lower portions 30d of the sliding contact slopes in the projecting portions 30e of the left and right swing plates 30 swing and approach the inner surface wall 22g. However, the biasing force of each of the torsion coil springs is constantly acting, Discharge side edges 25b on both sides
Of the paper discharge side edges 25 on both the left and right sides.
b does not separate from the protruding portions 30e of the swing plates 30 on both the left and right sides. Therefore, the projecting portion 30e of the swinging plate 30 is freely displaceable between the projecting position and the retracted position.

Each side plate left / right 22a, 2
2b, the adjacent protruding portions 30e of the rocking plates 30 overlap each other in the vertical direction Z when viewed in a plane perpendicular to the sheet discharging direction X, that is, are arranged at overlapping positions. When the paper discharge 25a descends while the paper discharge side edges 25b are in sliding contact with the respective protrusions 30e of the both rocking plates 30, the paper discharge 25a is continuously connected to the lower protrusions 30e adjacent to the respective rockers 30 sequentially. The paper is stacked on the paper discharge stacking surface 21b of the paper discharge tray 21 while keeping the U-shaped curved shape while slidingly contacting the paper discharge tray 25, and the paper discharge of the both paper discharge side edges 25b of the paper discharge 25a is performed.

Therefore, the swing plate 30 occupies the retracted position immediately after the protruding portion 30e comes into sliding contact with the discharge side edge 25b of the falling paper discharge 25a by the above-described respective structures, and the protruding portion 30e Occupies the protruding position immediately after the sheet is released from the sliding contact state with the sheet discharge side edge 25b, and
The protruding portion 30e is configured to occupy the retracted position when the discharged paper 25a stacked on the sheet is taken out upward.

Next, the operation will be described. First, the left and right side plates 22a and 22b on each side plate on the paper output tray 21 are adjusted to the position of the printing paper 25 stacked on the paper feed tray.
Then, the end plate 23 is moved and set at predetermined positions. At this time, each side plate left / right 22
The set widths of the print papers a and 22b in the paper discharge width direction Y are determined in accordance with the width of the print paper 25. After the left and right side plates 22a and 22b and the end plate 23 are positioned in this manner, a document is set on a document reading unit (not shown), and a start signal is transmitted by pressing a start button (not shown). Is done. When this start signal is transmitted, the plate cylinder 1 is rotated counterclockwise by rotating the drive motor, and the used master 9 of the plate cylinder 1 is driven by the plate discharge device of the plate discharge section. It is peeled off from the outer peripheral surface and discarded / discharged in the plate discharging box.

When the used master 9 is peeled off from the outer peripheral surface of the plate cylinder 1 and discarded, the plate cylinder 1 is stopped by being rotated to a position where the clamper 7 is located almost directly above in the figure.
When the plate cylinder 1 stops, the clamper shaft 7a is rotated by the opening / closing device, whereby the clamper 7 is opened and a plate feeding standby state is established. The document is conveyed to the document reading unit, and the image information of the document is converted into an electric signal by a CCD (image sensor including a charge-coupled device) of the document reading unit.
It is processed into a digital image signal via an (analog / digital) converter and a plate making control device (both not shown). The digital image signal of the original is supplied to the thermal head 1
When the thermal head 10 is energized in the main scanning direction in accordance with the image information, the heating perforation of the master 9 is started.
At the same time, the platen roller 11 and the transport roller pair 12
Is rotated, and while the master 9 is being conveyed in the sub-scanning direction, the heat-sensitive synthetic resin film portion of the master 9 is heated and perforated to perform plate making. In this way, the leading end of the prepress-made master 9 is further transported while being guided by the master guide plate 14, and the stage 6 and the expanded clamper 7 are opened.
When it is determined that the tip of the master 9 has reached the clamper 7 based on the number of steps of the stepping motor, the clamper shaft 7a is rotated to close the clamper 7, and the tip of the master 9 is connected to the clamper 7. It is clamped between the stage 6. At substantially the same time, while the plate cylinder 1 is rotated clockwise as indicated by an arrow in the figure at a peripheral speed substantially equal to the master transport speed, the master 9 having finished making the plate is wound around the outer peripheral surface of the plate cylinder 1.

When it is determined that the plate making is completed based on the number of steps of the stepping motor, the cutter 13
Operates to cut the rear end of the plate-making master 9 and stop the rotation of the platen roller 11 and the conveying roller pair 12 so that the rear end of the cut plate-making master 9 rotates the plate cylinder 1 And the winding around the outer peripheral surface of the plate cylinder 1 is completed.

At the same time as the winding of the master 9 having been made on the outer peripheral surface of the plate cylinder 1 is completed, the plate motor 1 is rotated clockwise by the drive motor being driven to rotate, and the separation of the sheet feeding unit is performed. The uppermost printing paper 25 stacked on the paper feed tray is separated and fed by the paper feeding device, and the timing is set by the registration roller pair 16 so that the printing paper 25 is moved between the plate cylinder 1 and the press roller 15. It is conveyed toward. Then, the feeding of the printing paper 25 is detected by a paper detection sensor (not shown) arranged on the paper conveyance path between the registration roller pair 16 and the press roller 15, and the holding of the press roller 15 by the locking means is performed. The state is released and the press roller 15 is raised toward the outer peripheral surface of the plate cylinder 1 by the urging force of the urging spring.
5 is continuously pressed against the plate cylinder 1. Then, the printing paper 25 is pressed by the press roller 15 onto the plate cylinder 1 via the plate-making master 9, so that the plate-making master 9 is cut through the opening on the surface of the plate cylinder 1.
Is transferred to the surface of the printing paper 25 and printing is performed. At this time, the ink roller 2 also rotates in the same direction as the rotation direction of the plate cylinder 1, and supplies ink to the inner peripheral surface of the plate cylinder 1.

The leading end of the printed printing paper 25a is separated by a peeling claw 8 which is selectively close to the plate cylinder 1, and the printing cylinder 25
Is peeled off from the outer peripheral surface of the sheet and further conveyed to the downstream side in the sheet discharging direction X by the suction conveyance device. At this time, the printed printing paper 25a, that is, the discharged paper 25a is corrugated in a substantially U-shape by the jump plate pair 20 of the suction conveyance device and discharged toward the paper discharge tray 21 through the paper discharge flight line Xa. Is done. At this time, the leading edge of the paper discharge 25a once collides with the surface of the end plate 23 and rebounds, and the paper discharge 25a, which has almost lost the kinetic energy of the paper discharge 25a due to the collision with the surface of the end plate 23, is removed from each side plate. The two paper discharge side edges 25b are guided by the inner walls 22g of the left and right 22a, 22b and descend while being regulated, and both the paper discharge side edges 25b are in sliding contact with the respective projecting portions 30e of both the rocking plates 30, The sheet stacking surface 21 of the sheet discharge tray 21 is sequentially dropped while slidingly contacting each of the protrusions 30e of the lower rocking plates 30.
b.

At this time, as shown in FIG. 5, the discharge 25a, which has almost lost the kinetic energy of the discharge 25a due to the collision with the surface of the end plate 23, descends first and then both discharges of the discharge 25a. When the paper side edge 25b falls while slidingly contacting each sliding contact inclined surface 30c of the uppermost rocking plate 30 on both the left and right sides, the weight of the discharged paper 25a overcomes the urging force of the torsion coil spring. The upper and lower sliding contact inclined surfaces 30c swing clockwise and counterclockwise about the swinging plate shaft 30a, respectively, to swing and displace outward from inside the side wall of each window 22d. Is done. In other words, the protruding portions 30e of the swinging plates 30 on both the left and right sides are moved up and down on the respective sliding contact inclined surfaces with the lowering of the sheet discharge 25a.
0c swings clockwise and counterclockwise about the swing plate shaft 30a as a fulcrum while sliding on each of the paper discharge side edges 25b of the paper discharge 25a, so that from the inside of the side wall of each window 22d to the outside. Each is rocked and displaced. At the same time, the lower portions 30d of the respective sliding contact slopes of the projecting portions 30e of the left and right swing plates 30 swing clockwise and counterclockwise, respectively, as viewed in a plane orthogonal to the sheet discharge direction X. The paper discharge side edge 25b approaches the inner surface wall 22g and descends while slidingly contacting the sliding contact inclined surface lower part 30d. In this way, the paper discharge 25a descends while successively slidingly contacting the upper and lower sliding contact surfaces 30c and 30d of the plurality of lower rocking plates 30 on the left and right sides, respectively.
A substantially central portion of the paper discharge 25a descends while maintaining a U-shaped curved state in which it is bent downward, and is released from a sliding contact state with each rocking plate 30 at a position close to the paper discharge stacking surface 21b to discharge the paper. The discharged paper 25 is stacked neatly on the paper discharge stacking surface 21b of the paper tray 21.
The alignment of the two paper discharge side edges 25b, that is, the paper discharge alignment is performed.

Then, the master 9 is filled with ink by the printing operation, so-called printing or test printing is performed, and at the same time, the press roller 15 returns to the initial position separated from the plate cylinder 1 to enter a printing standby state. The printing of the designated number of sheets is continuously and repeatedly performed in each of the above-described paper feeding, printing, and paper discharging processes.

After the designated number of sheets have been printed, a bundle of discharged papers 25a, such as both paper discharge side edges 25b of the paper discharge paper 25a, which have been aligned, is taken out from the paper discharge tray 21 in the upward direction. Occasionally, the discharge side edges 25b on both the left and right sides of the discharge 25a that has been neatly aligned as described above,
30 d below each sliding contact inclined surface on each rocking plate 30 on both left and right sides
, The respective protruding portions 30e occupy the retracted positions in the order opposite to that described above, while continuously sliding on the respective sliding contact inclined surfaces 30c in the order opposite to that described above. Is smoothly performed without causing any damage to the protruding portion 30e of each swing plate 30 or the like.

(First Modification) FIG. 6 shows a first modification of the first embodiment. In the same figure, reference numeral 30A indicates a swing plate of the first modification. The first modification is different from the first embodiment only in that a swing plate 30A is provided instead of the swing plate 30 of the first embodiment.

The projecting portion 30Ae of the swinging plate 30A is different from the projecting portion 30e of the swinging plate 30 in that the top surface of the projecting portion 30Ae is replaced with a sliding contact inclined surface 30c inclined in an inverted "C" shape. Of the protrusion from the inner wall 22g, and a shape change portion around the top of the protrusion 30Ae is formed by a rounded sliding contact surface 30Ac and is connected to the rocking plate stopper 30b in a substantially horizontal plane. In place of the lower portion 30d inclined in a "C" shape, the protrusion dimension from the inner wall 22g at the top of the protrusion 30Ae is reduced, and the "C" shape connected thereto is formed. The only difference is that there is a 30Ad below the sliding contact inclined surface in which the inclined surface is made steeper.

In the protruding portion 30Ae, a sliding contact round surface 30Ac connected to the swing plate stopper 30b in a substantially horizontal plane.
The angle between the sliding surface 30Ad and the lower side 30Ad is such that the amount of protrusion of the protrusion 30Ae protruding from the inner wall 22g of each of the left and right side plates 22a and 22b toward the paper discharge stacking surface 21b is the same as in the first modification. When it is restricted and relatively small, it may be an acute angle smaller than 90 degrees.

As in the first embodiment, the protruding portion 30Ae of the swinging plate 30A is formed on the inner wall 22 of each of the left and right side plates 22a and 22b with which the respective discharge side edges 25b of the discharge 25a come into contact.
g, and can be displaced between a protruding position protruding toward the discharge stacking surface 21b side and a retreat position retracted from the protruding position toward the outside of each of the left and right side plates 22a and 22b.

The operation of the first modification will be briefly described only for the differences from the first embodiment. Projection 30 of rocking plate 30A
Ae is formed by reducing the protrusion size of the top of the protrusion 30Ae, and forming a shape change portion around the top of the protrusion 30Ae with a rounded sliding contact surface 30Ac having a round shape, and substantially forming the swing plate stopper 30b. As the paper discharge 25a descends, first, the paper discharge side edges 25b on the left and right sides of the paper discharge 25a are slidably rounded on the uppermost rocking plates 30A on both the left and right sides. It falls while sliding on the surface 30Ac, and operates in the same manner as in the first embodiment. Also,
Needless to say, when the bundle of the discharged paper 25a is taken out from the paper discharge tray 21 in the upward direction without any trouble according to the first embodiment.

(Modification 2) FIG. 7 shows another modification 2 of the first embodiment. In the figure, reference numeral 30B denotes a swing plate of the second modification. The second modification is different from the first embodiment only in that a swing plate 30B is provided instead of the swing plate 30 of the first embodiment.

The protruding portion 30Be of the oscillating plate 30B is formed with a saw blade-like surface instead of the lower portion 30d of the slidable contact surface of the protruding portion 30e of the oscillating plate 30 which is inclined in a "C" shape. The only difference is that it has a sliding contact inclined surface lower 30Bd inclined in a "C" shape.

As in the first embodiment, the projecting portion 30Be of the swinging plate 30B is formed with the inner wall 22 of each of the left and right side plates 22a and 22b with which the respective paper discharge side edges 25b of the paper discharge 25a contact.
g, and can be displaced between a protruding position protruding toward the discharge stacking surface 21b side and a retreat position retracted from the protruding position toward the outside of each of the left and right side plates 22a and 22b.

The operation of the second modification will be briefly described focusing on the differences from the first embodiment. With the lowering of the paper discharge 25a, first, both the paper discharge side edges 25b of the paper discharge 25a are set on the respective sliding contact inclined surfaces of the uppermost rocking plates 30B on the left and right sides.
When falling while sliding against 0c, the own weight of the paper discharge 25a overcomes the urging force of the torsion coil spring, so that the left and right sliding contact inclined surfaces 30c on the sloping plate shafts are similar to the first embodiment. It swings clockwise and counterclockwise around 30a as a fulcrum, and swings and displaces from the inside of the side wall of each window 22d outward. At the same time, the lower part of each sliding contact inclined surface 3 on the left and right swing plates 30B.
0Bd also swings clockwise and counterclockwise, respectively, as viewed in a plane perpendicular to the paper discharge direction X to approach the inner wall 22g. It descends while sliding in contact with each of the saw blade-shaped surfaces 30Bd below. In this way, the delivery 25a
Are sequentially descended while sliding on the upper and lower sliding surfaces 30c and 30Bd of the plurality of lower rocking plates 30B on both the left and right sides, and the substantially central portion of the paper discharge 25 is downward. The sheet is lowered while maintaining its U-shaped bent state, and is released from the state of sliding contact with each rocking plate 30B at a position close to the sheet discharge tray 21 to be on the sheet discharge stacking surface 21b of the sheet discharge tray 21. Are stacked in an orderly manner, and the paper discharge alignment of both paper discharge side edges 25b of the paper discharge 25a is performed. Needless to say, when the bundle of the discharged paper 25a is taken out from the paper discharge tray 21 in the upward direction, there is no trouble according to the first embodiment.

The displacement movable member is not limited to the mounting structure of the oscillating plates 30, 30A, 30B in the first embodiment and each of the modifications, and may be as follows. For example, in the case of the swing plate 30 as shown in FIG.
Instead of a structure in which the lower end portion of the swing plate 30 is pivotally supported by the swing plate shaft 30a, the upper end portion of the swing plate 30 is pivotally supported by the swing plate shaft 30a,
The torsion coil spring may be provided so as to urge the lower end portion of the rocking plate 30 to occupy the projecting position, or the upper and lower substantially mountain-shaped shapes of the rocking plate 30 are inverted. And the upper end of the swing plate 30 is pivotally supported by a swing plate shaft 30a, and the torsion coil spring is provided so as to urge the lower end of the swing plate 30 in a direction occupying the projecting position. Is also good.

In the case of a swing plate 30A as shown in FIG.
The upper end of A may be pivotally supported by the swing plate shaft 30a, and the torsion coil spring may be provided so as to urge the lower end of the swing plate 30A in a direction occupying the projecting position. Similarly, in the rocking plate 30B as shown in FIG. 7, the upper end of the rocking plate 30B is supported by a rocking plate shaft 30a in a state where the upper and lower substantially chevron shapes are inverted, and the torsion is performed. The coil spring may be provided so as to bias the lower end of the rocking plate 30B in a direction occupying the protruding position.

Further, the embodiment of the present invention is not limited to the first embodiment and each of the modifications, and the movable displacement member does not need to be directly supported by the side plate.
As long as it has the configuration and structure in the described invention, it may be provided separately from the side plate.

The number of side plates provided is not limited to the above-described first embodiment and each modified example. If the advantages of the first embodiment and each modified example are not desired, one side plate may be used. It may be movable or fixed in the paper width direction Y.

Further, the number of displaceable movable members is not limited to the above-described first embodiment and each modified example. If the advantages of the first embodiment and each modified example are not desired, the number of displaceable movable members may be one. The number may be only one. Of course, when the movable displacement member has a pair of side plates as in the first embodiment and each of the modifications, the projecting portion of each movable displacement member causes each of the discharged paper sheets to fall. The paper is slid into contact with the side edge of the paper, and the paper is discharged and stacked on the paper discharge stacking surface of the paper discharge tray while the substantially central part of the paper discharge is kept in a U-shaped curved shape. In order to improve the paper ejection alignment as compared with the case, it is preferable that the side plates are provided with the same number and symmetrical positions at the same position as described above.

The arrangement of the movable displacement member is not limited to the above-described first embodiment and each of the modified examples, but may be at any position upstream or downstream in the sheet discharging direction X. The overlap position of the group of rocking plates 30 as in the modification and the like may be moved back and forth with respect to the paper discharge direction X, and further, the group of rocking plates 30 may be provided in a plurality of rows. Since the U-shaped curved shape returns as the side plate falls down, to compensate for this, the substantially mountain shape may gradually increase toward the lower side of the side plate.

In short, the movable displacement member has a substantially mountain shape which is not caught when the discharged paper 25a is taken out upward. In other words, the movable displacement member has the structure and structure according to the first aspect of the present invention, The protruding portion of the member has a substantially horizontal chevron shape protruding from the inner surface wall 22g side to the paper discharge stacking surface 21b side, and one of the upper and lower base portions in the chevron shape is pivotally supported, and the upper and lower base portions are supported. Is swingable clockwise and counterclockwise around its axis when viewed in a plane perpendicular to the paper discharge direction X, and occupies the projecting portion of the movable displacement member in the projecting position. What is necessary is just to have the structure which has the displacement urging | biasing means which energizes in the direction (refer to invention of Claim 3).

Further, the embodiment of the present invention is not limited to the paper discharge 25a in which the U-shaped curve is formed by the paper discharge waist means such as the jump plate pair 20 in the above-described first embodiment and each of the modifications. It is possible to satisfactorily align and align the paper discharge side edges of the paper discharged normally from a paper discharge device such as a copying machine as it is, and it goes without saying that the present invention can be applied to those devices. . In addition, the paper used in the present invention is not limited to the printing paper 25 for stencil printing, but may be a PPC paper or a plastic sheet.

[0065]

As described above, according to the first aspect of the present invention, in the movable displacement member, the protruding portion of the movable displacement member is in sliding contact with the discharge side edge of the falling paper. Immediately after that, it occupies the evacuation position, and is configured so as to occupy the projecting position immediately after the projecting portion is released from the state of sliding contact with the sheet ejection side edge, so that the substantially central portion of the sheet ejection becomes U-shaped. Since the paper is discharged and stacked on the paper discharge stacking surface of the paper discharge tray while maintaining the curved shape, the paper discharge alignment is improved. Further, since the projecting portion is configured to occupy the retracted position when ejecting the sheet stacked on the sheet ejection table upward, the projecting portion of the movable displacement member comes into contact with the sheet ejection side edge portion. Also, since the movable member is displaced to the retreat position which does not hinder the ejection of the discharged paper, the movable member does not hinder the operation at all, and there is no operational trouble in taking out the discharged paper. Further, it is possible to provide an inexpensive sheet discharging and stacking apparatus which does not cause the movable movable member to bend in the opposite direction and break when the sheet is forcibly taken out as in the related art.

According to the second aspect of the present invention, the side plates are provided on the sheet discharge table in such a manner that the inner surfaces of the side plates are paired so as to be parallel to each other. The protruding portion slides on the respective discharge side edges of the discharged paper, and the substantially central portion of the discharged paper is surely kept in a U-shaped shape on the discharge stacking surface of the paper discharge tray. Since the sheets are discharged and stacked, the paper discharge alignment is further improved.

According to the third aspect of the present invention, when the projecting portion having the substantially mountain shape of the movable displacement member slides on the discharge side edge of the falling paper, the substantially mountain shape is formed. The protruding portion occupies the retracted position by swinging and displacing around its axis when the own weight of the discharged paper overcomes the urging force of the displacement urging means, and the substantially mountain-shaped protruding portion is formed on the discharging side edge. Immediately after being released from the state of sliding contact, the urging force of the displacement urging means swings and displaces around its axis to occupy the protruding position, so that a substantially central portion of the discharged paper is curved in a U-shape. The paper is discharged and stacked on the paper discharge stacking surface of the paper discharge tray while maintaining the paper discharge, thereby improving the paper discharge alignment. Also, when the discharged paper stacked on the paper discharge tray is to be taken out upward, the substantially mountain-shaped projecting portion is formed around its axis by the operation force at the time of taking out the paper ejection overcoming the urging force of the displacement urging means. By oscillating and displacing to occupy the retracted position, even if the protruding portion of the displaceable movable member comes into contact with the discharge side edge, the displaceable movable member is displaced to the retracted position which does not hinder the ejection of the discharged sheet. Without disturbing, there is no need for troublesome operation when taking out the paper. Also, unlike the conventional case, when the discharged paper is forcibly taken out, the displacement movable member does not bend in the opposite direction and break,
An inexpensive sheet discharging and stacking device can be provided.

According to the fourth aspect of the present invention, the side plate is provided with a plurality of movable displacement members in the vertical direction, and adjacent projections of each movable displacement member are orthogonal to the sheet discharging direction. Since the paper is arranged in a vertically overlapping manner when viewed from the side, the paper discharge side edge of the paper discharge descends while continuously slidingly contacting the adjacent protrusions of each movable member. It is possible to prevent the discharged paper having a curved shape from returning to the original shape at the descent position where the displacement movable member is interrupted, and to prevent the discharge stacking from becoming unstable and the discharge alignment from being deteriorated. it can.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram of a stencil printing apparatus to which an embodiment of the present invention is applied.

FIG. 2 is a partial front sectional view of a main part of the sheet discharging and stacking apparatus according to the first embodiment.

FIG. 3 is a right side sectional view of FIG. 2;

FIG. 4 is a partially enlarged perspective view of a rocking plate of the sheet discharging and stacking device in the first embodiment.

FIG. 5 is a front sectional view showing the operation of the sheet discharging and stacking device in the first embodiment.

FIG. 6 is a partial front sectional view of a main part of a sheet discharging and stacking apparatus showing a first modification of the first embodiment;

FIG. 7 is a partial front sectional view of a main part of a sheet discharging and stacking apparatus showing another modification 2 of the first embodiment.

FIG. 8 is an explanatory diagram illustrating a failure state of paper ejection alignment on a paper ejection tray.

[Explanation of symbols]

21 Discharge tray as a discharge tray 21b Discharge stacking surface 22a, 22b Side plate left / right 22g Inner wall 25a Discharge (printed printing paper) 25b Discharge side edge 29 Discharge stacking device 30, 30A, 30B Oscillating plate 30c, 30d as movable displacement member 30c, 30d Above / under sliding contact inclined surface having substantially mountain shape 30e, 30Ae, 30Be Projecting portion 30a Oscillating plate axis as axis of movable displacement member X Discharge direction Y Discharge width Direction Z Vertical direction

Claims (4)

[Claims] A discharge tray provided with a discharge stacking surface for stacking discharges, and an erecting tray for guiding a discharge side edge of the discharge and aligning the discharge discharge with the discharge stacking surface; And a projecting position protruding from the inner wall of the side plate with which the sheet ejecting side edge contacts to the sheet ejecting surface side and extending outward from the projecting position. And at least one movable displacement member having a protrusion that is displaceable between the retracted position and the retracted position and that is slidably contactable with the paper discharge side edge. Part occupies the retracted position immediately after sliding on the falling paper discharge side edge, and changes the protrusion position immediately after the protrusion is released from the state of sliding contact with the paper discharge side edge. Occupied, and the upper side of the paper discharge tray Sheet discharge stacking apparatus protrusion is characterized by being configured to occupy the retracted position. 2. The sheet discharge stacking device according to claim 1, wherein the side plates are provided on the sheet discharge table in pairs such that the inner surfaces of the side plates are parallel to each other. 3. The displacement movable member, wherein the projecting portion has a substantially horizontal chevron shape protruding from the inner wall side to the paper discharge stacking surface side, and one of the upper and lower base portions in the chevron shape. One is pivotally supported, and the other of the upper and lower bases is configured to be swingable clockwise and counterclockwise around the axis when viewed in a plane perpendicular to the sheet discharging direction. 3. The sheet discharging and stacking device according to claim 1, further comprising a displacement urging means for urging the projecting portion of the member in a direction occupying the projecting position. 4. The side plate is provided with a plurality of the movable displacement members in a vertical direction, and the adjacent protruding portions of each of the movable displacement members are viewed from a plane orthogonal to a sheet discharging direction. The sheet discharge stacking device according to claim 1, 2 or 3, wherein the sheet stacking device is arranged so as to overlap in the vertical direction.